We're working on integrating with Swift, but despite the team's earnest efforts, Swift/C++ interop is still young and unstable.
On a personal note, I'm increasingly feeling like "C++ with a garbage collector" might actually be a reasonable tool for the task at hand. Watching the development of Fil-C in this space..
which is great.
I never learned swift but I can add features easily now or create 1-day projects using swiftUI that makes great macOS native UI's.
V8 also has torque which I think to some degree also fits into that type of mindset.
careful, last time someone said that we got Rust
C# is more platform independent. Has a well-tested GC.